HELIX— Plate CLXXXVIII. 



Species 1312. (Mus. Cuming.) 



Helix diapiiana. IM. le»td imperforatd, tem'ujlobosS, 

 leiiiii, aiM<trigatd, tiiteiitf, fiihido-cornea, prltucidd ; 

 tpird oLtu*d ; anfractihiu quatuur, coiiFrxiuiiciilii, ill- 

 tiiHO circa columellam excacalo; columelld profuudi 

 intrante, coHcaci catloio-dilatafd ; aprrtiird liiiiato- 

 ocati, labro aimplici. 



The niAPiiANois Helix. Shell imperforated, scmiglo- 

 bose, thin, nearly smooth, shining, fulvous homy, 

 transparent ; spire obtuse ; whorls four, rather con- 

 vex, the Inst excavated round the eoiumella ; columella 

 entering deeply, coneavciy cidlously dilated ; aperture 

 lunar-oval, lip simple. 



Lamarck, Anim. sans. vert. (l)cshayes'edit.)vol. viii.p.62. 



JJtid. Island of I'orto Rico, West Indies ; IJlauner. 



Chiefly characterized by the concave callously dilated 



structure of the columella. 



Species 1313. (Mus. Cuming.) 



Helix Moretoxensis. JIfl. tesid r/x uiMlicald, siib- 

 globo»o-conoided, oliraceo-conied, infra litlescenle, mb- 

 pellucidd, tuperiti arciialim pUcato-driatd, lineii im- 

 pressis spiralibim drctinmld ; ipird conrexo-phiimtd ; 

 aiifractibuH qiiiiiqiie ad sex, ultimo cariiiato ; aperliird 

 late lunari, labro gimpliri. 



The JIoheton Helix. Shell scarcely umbilicated, some- 

 what globosely conoid, olive-horny, yellowish beneath, 

 arcuately ])licately striated at the upper part, decus- 

 sated witli impressed spiral lines ; spire convexly 

 flattened ; whorls five to six, the last keeled ; aper- 

 ture l)roadly lunar, lip simple. 



I'feiffer, I'ro. Zool. Soc. 1S5I. 



JIai. Moreton Bay, Australia ; Strange. 



An olive-horny species, of simple structure, scarcely 



umbilicated. 



Species 1314. (llus. Cuming.) 

 Helix hombvcina. //<•/. tenia sublale pumpectite umbi- 

 licatd, depreiuo-orbiculari, tubdmcoUled, oblique dense 

 costellalo-ntriatd, corned, niijricniite-riridi, vi/tis riijix 

 intrrruptin iiitidi tennellatim ciiiyulald ; spird piano- 

 depressd ; aiifractibuii tribus ad qualuor, ultimo roluii- 

 data ; aprrturd circulari, labro siiiiplici, marginibua 

 approxiniatie. 

 The bombasine Helix. Shell rather broadly perspcc- 

 tively umbilicated, dcpressly orbicular, subdiscoid, 

 oblifjucly densely rib-like striated, horny, blackish- 

 green, neatly tesscllately eneirchnl with interrupted 

 red fdlets ; whorls three to four, the last rounded ; 

 aperture circular, lip simple, margins approximated. 



rpEiFPER, Pro. Zool. Soc. 1854. 



JIab. Van DicincD's Land ; KonnUl C. riunn. 



A nently-inorkfd chanieteristic species, of silky n»p*ct, 

 though of tliin hard horny texture. 



Species 1315. (Mus. Cuming.) 



Helix COXCAVO-SPIBA. Ilrl. tettd miHuiiviime umbili- 

 cald, acute couoided, bati coacrxd, pellucido-albidd, 

 supra dense costellato-striald et decMssatini gra unlaid, 

 infra Itfriyatd et tnmido-rvnrexd ; spird rrecid, ad 

 talus snbroncard ; anfraclibus sex, ad suluras Minute 

 filo-tnarginatis, superni concexis, deinde coscaeis, ul- 

 timo ad prriplieriam acute fHo-cariHato ; aprrturd tr- 

 curifurmi, labro simplici. 



The hollow-spired Helix. Shell \er\ minutely um- 

 bilicated, sharply conoid, convex at the base, trans- 

 parent whitish, densely rib-striated and decussately 

 granulated above, smooth and tumidly convex be- 

 neath ; spire erect, subconcave at the side ; whorls 

 six, minutely thread-margined at the sutures, convex 

 at the up])er part, then concave, the last sharply 

 thread-keeled at the peripherj' ; aperture hntchet- 

 shaped, lip simple. 



Pfeiffek, Pro. Zool. Soc. 1854. 



JIab. Ceylon ; Thwaites. 



A delicate pagoda-like shell, closely allied to J/, //y- 

 phasma from the same locality, of transparent-whitish tex- 

 ture, minutely granulately rib-striated, and made concave 

 next the peripliery by a sharp subrellected keel. 



Species 1316. (Mus. Cuming.) 



Helix SEMICOXVEXA. Ilel. textd sublate umbiUcald, dr- 

 presso-orbiculari, castaneo-cornrd, :onuld castaurd cin- 

 ijulatd, eximie corrugato-slriatd, versus apicem lire*- 

 cente ; anfraclibus qualuor ad quiiique, plano-courexis, 

 ad suluras tenuimarginatis, ultimo ad prripheriam ^lo- 

 carinato ; aperturd iransrerse lunari, labro simplici. 



The semiconvex Helix. Shell rather broiully umbili- 

 cated, depressly orbicular, cheslimt-honiy, encia-led 

 with a chestnut zone, faintly wrinkle-striated, rather 

 livid towards the apex ; whorls four to live, flatly 

 convex, finely margined at the suture, the last thread- 

 keeled at the peri])hery ; npcrtun- transversely lunar, 

 lip simple. 



Pkeipfer, Pro. Zool. Soc. 1854. 



//nb. Solomon's Island. 



A subtransparent chestnut-brown shell, eiirireled with 

 a fine thread-like keel at the suture of each whorl. 



